Something different about 2004 headlights and my 2005 & 2006 headlights. On my '05 & '06 models there is a vent tube on the upper corner that is prone to let water in if the tube is missing. This 2004 model has no vent, that I can find, and don't know how water is getting into the lens. The light assembly looks almost like new with no cracks in lens. Anyone have an insight into this problem?